JPH06237551A - Motor - Google Patents

Abstract

PURPOSE:To provide a motor which is excellent producitivity is excellent, can fix its flexible board with sufficient strength, is excellent in relability is excellent and has a low production. CONSTITUTION:A motor 10 is constituted in such a way that a sleeve 12 installed at a stator part 13 is inserted into, and passed through, one end part 2 in a flexible board 24. In the motor, the one end part 2 in the flexible board 24 is provided with a through hole into and through which the sleeve 12 is inserted and passed, a reinforcement member 25 is installed at the one end part 2, and the stator part 13 including the reinforcement member 24 and the sleeve 12 is force-fitted and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a motor used in a recording / reproducing apparatus such as an optical disk.

[0002]

2. Description of the Related Art Conventionally, this type of motor is constructed as shown in FIG. In the figure, a motor 1 has a substantially disk-shaped stator portion 4, a sleeve 5 provided so as to stand upright from the stator portion 4, and a rotor portion 3 fitted to the sleeve 5 from above. There is. The flexible substrate 6 is fixed to the sleeve 5 in order to supply a drive current to the motor.

The flexible substrate 6 has a tip portion 6
As shown in the figure, a has a ring shape having a through hole 6b for insertion in the center. And this tip portion 6a
Similarly, a reinforcing plate 7 formed in a substantially ring shape is integrally fixed to the lower surface of the above in advance, and the sleeve 5 is inserted into both of them. And
The rotor portion 3 is fitted onto the sleeve 5, and the motor 1 is assembled.

The reinforcing plate 7 is used to reinforce the end 6a of the flexible substrate 6, and the reinforcing plate 7 is fixed to the end 6a of the flexible substrate 6 in advance. Then, the end portion 6a of the flexible substrate 6
When the motor is fixed to the motor, the reinforcing plate 7 on the lower surface of the end portion 6a is fixed to the upper surface of the rotor 4 or the peripheral surface of the sleeve 5 with an adhesive. As a result, the flexible substrate 6 is securely fixed to the rotor portion of the motor 1 so that necessary driving current can be supplied.

[0005]

However, in the case of assembling the motor 1 as described above, when the flexible substrate 6 is fixed, until the adhesive dries and solidifies, the end which is the fixing point is fixed. In order to prevent the portion 6a from floating, it must be pressed against the rotor 4, for example. For this reason, it takes time and effort to hold down the end 6a of the flexible substrate 6, and there is a problem in terms of productivity.

Further, as a means for fixing the flexible substrate 6, an adhesive may be used instead of an adhesive. In this way, even if the above productivity problem can be solved, it is weak when a solvent or the like acts, and the adhesive strength is low, but it is inferior to the adhesive, and there is a problem that the reliability is poor.

Further, as shown in FIG. 9, there is also a means for fastening the flexible substrate 6 to the upper surface of the stator portion 4 with screws 8. However, according to such a means, the number of parts is increased, and it is necessary to provide a screw tap on the stator portion 4, which causes a rise in the manufacturing cost of the motor.

In view of the above points, the present invention has an object to provide a motor which is excellent in productivity, moreover, the flexible substrate can be fixed with sufficient strength, and which is excellent in reliability and can be manufactured at a low cost.

[0009]

According to the present invention, there is provided a motor having a structure in which a sleeve provided on a stator portion is inserted into one end of a flexible substrate, wherein one end of the flexible substrate has the sleeve. This is achieved by a motor which has a through hole through which a reinforcing member is provided, and a reinforcing member is provided at one end thereof, and the reinforcing member and the stator portion including the sleeve are press-fitted and fixed.

Preferably, a reduced diameter portion is provided in the vicinity of the base of the sleeve, and a reinforcing member can be fitted in the reduced diameter portion.

Alternatively, an enlarged diameter portion may be provided near the base of the sleeve, and the enlarged diameter portion may dig into the reinforcing member.

Preferably, the stator is provided with a ring-shaped groove along the outer circumference of the sleeve, and the reinforcing member may be press-fitted into the groove.
Further, preferably, one end of the flexible substrate is formed in a ring shape having an insertion hole at the center, and a reinforcing member having substantially the same shape as the ring-shaped one end is provided, and the one end of the flexible substrate and The reinforcing member may be configured to have a slit along the hole.

[0013]

According to the above construction, the reinforcing member fixed to one end of the flexible substrate is press-fitted into the rotor portion. Therefore, the flexible board and the motor can be connected only by this press-fitting operation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. The examples described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

FIG. 1 is a sectional view showing an embodiment of a motor according to the present invention. In the figure, a motor 10 includes a stator portion 13 having a sleeve 12 integrally provided with the base 11 so as to stand upright from the base 11 having a substantially disk shape. A coil 15 is provided outside the sleeve 12 of the stator portion 13 so as to surround the sleeve 12 along the circumferential direction. A rotor portion 17 having a rotating shaft 18 is fitted on the stator portion 13.
The rotary shaft 18 of is passed through the sleeve 12.

The rotor portion 17 is provided with a cover 21 so as to surround the coil 15 arranged along the circumferential direction of the sleeve 12. Inside this cover 21,
A rotor magnet 23 is fixed so as to surround the magnet 15 so as to face the magnet 15 in a non-contact manner.

Further, to the motor 10 of this embodiment, a flexible substrate 24 for supplying drive current and the like is fixed via a reinforcing plate (reinforcing member) 25. And
For example, the terminal drawn from the coil 15 side can be connected to a land (not shown) provided on the upper surface of the flexible substrate 24. As a result, when the coil 15 is energized, the rotary shaft 18 is rotationally driven.

Here, the flexible substrate 24 is fixed as follows, for example. Flexible board 24
In this embodiment, for example, as shown in FIG. 2, one end 24a thereof is formed in a ring shape and has a through hole 24b in the center. The through hole 24a is formed slightly larger than the outer shape of the sleeve 12. And
On the lower surface of the one end portion 24a of the flexible substrate, a reinforcing plate 25 having a substantially ring shape similarly to this is fixed in advance in a superposed state. The reinforcing plate 25 is preferably a paper phenol plate, a glass epoxy plate, or a metal plate. The one end 24a of the flexible substrate 24 is fixed to the stator 13 so that the sleeve 12 is passed through the through hole 24b.

Specifically, for example, as shown in FIG.
The sleeve 12 provided upright on the base 11 of the stator portion 13 is formed to have a reduced diameter in the vicinity of the root thereof. On the other hand, the inner diameter of the through hole 25a of the reinforcing plate 25 fixed to the lower surface of the one end portion 24a of the flexible substrate is formed to be slightly smaller than the outer diameter of the sleeve 12. As a result, the through hole 25 a of the reinforcing plate 25 is forcibly press-fitted into the sleeve 12, so that the through hole 25 a of the reinforcing plate 25 is
The inner surface of a fits into the reduced diameter portion 28 of the sleeve 12.
Therefore, the one end portion 24a of the flexible substrate is fixed to the stator portion 13 including the sleeve 12 by a simple operation.

In this case, for example, as shown in FIG.
A plurality of slits 26 can be provided inside the through hole 24b of the one end 24a of the flexible substrate and inside the through hole 25a of the reinforcing plate 25. By doing so, the work of press-fitting the one end portion 24a of the flexible substrate including the reinforcing plate 25 into the sleeve 12 becomes easy.

In the example of FIG. 4, the enlarged diameter portion 128 is formed near the base of the sleeve 12. This expanded portion 128 is
For example, as shown in the drawing, the tip is formed to have a substantially wedge-shaped cross section. On the other hand, the through hole 25 of the reinforcing plate 25 fixed to the lower surface of the one end 24a of the flexible board.
The inner diameter of a is formed to be slightly larger than the outer shape of the sleeve 12. Then, the sleeve 12 is inserted into the through hole 25a of the reinforcing plate 25, and the expanded diameter portion 12 of the sleeve 12 is inserted.
When 8 is forcibly pressed into the inner surface of the through hole 25a of the reinforcing plate 25, the enlarged diameter portion 128 bites into the inner surface of the through hole 25a of the reinforcing plate 25. As a result, the reinforcing member 25 is fixed to the stator portion 13 by a simple operation.

In the example of FIG. 5, the base portion 11 which is a part of the stator portion 13 is provided with a ring-shaped groove 11a so as to surround the sleeve 12. Then, one end 24 of the flexible substrate fitted in the groove 11a
The outer shapes of a and the reinforcing plate 25 are configured to be slightly larger than the inner diameter 11b of the groove 11a.

As a result, one end 2 of the flexible substrate is
When 4a and the reinforcing plate 25 are forcibly pressed into the groove 11a, the outer peripheral portion of the reinforcing plate 25 comes into pressure contact with the outer diameter portion 11b of the groove 11a. Thereby, the reinforcing member 25 can be fixed to the stator portion 13 by a simple operation.

FIG. 6 shows still another fixing means.
In the figure, the pin 3 is provided on the base 11 of the stator portion 13.
1 has been planted. On the other hand, a hole 33 is provided in the one end portion 24 a of the flexible substrate and the reinforcing plate 25 at a position corresponding to the pin 31. The inner diameter of the hole 33 is the same as or slightly smaller than the outer diameter of the pin 31. As a result, the pin 31 on the base 11
Is forcedly inserted into the hole 33 of the reinforcing plate 25 or the like, the one end portion 24a of the flexible substrate is easily fixed to the stator portion 13.

As described above, according to this embodiment, the flexible substrate can be securely fixed to the stator portion including the slave by a simple work such as press-fitting work. Moreover, since it is not necessary to use a large number of parts for this fixing means, it is possible to keep the product cost low.

[0026]

As described above, according to the present invention, the motor is excellent in productivity, and the flexible substrate can be fixed with sufficient strength, so that the motor is excellent in reliability and can be manufactured at a low cost. Can be provided.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a motor according to the present invention.

FIG. 2 is a schematic perspective view showing a state where a flexible substrate is attached to a stator portion of the motor shown in FIG.

3 is a schematic cross-sectional view showing a fixing structure of a stator portion and a flexible substrate of the motor shown in FIG.

FIG. 4 is a schematic cross-sectional view showing another fixing structure of the stator portion and the flexible substrate of the motor of FIG.

5 is a schematic cross-sectional view showing another fixing structure of the stator portion and the flexible substrate of the motor of FIG.

6 is a schematic perspective view showing another fixing structure of the stator portion and the flexible substrate of the motor of FIG.

7 is a schematic perspective view showing a preferred structure of one end of a flexible substrate in the motor of FIG.

FIG. 8 is a schematic perspective view showing an example of a conventional fixing structure for a stator portion of a motor and a flexible substrate.

FIG. 9 is a schematic perspective view showing another example of a fixing structure of a conventional motor stator portion and a flexible substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Motor 12 Sleeve 13 Stator part 17 Rotor part 24 Flexible board 24a One end part of flexible board 25 Reinforcing plate (reinforcing member)

Claims (5)

[Claims] 1. A motor having a structure in which a sleeve provided in a stator part is inserted into one end of a flexible substrate, wherein one end of the flexible substrate has a through hole through which the sleeve is inserted, and The motor is characterized in that a reinforcing member is provided, and the reinforcing member and a stator portion including a sleeve are press-fitted and fixed. 2. The motor according to claim 1, wherein a reduced diameter portion is provided near the base of the sleeve, and a reinforcing member is fitted in the reduced diameter portion. 3. The motor according to claim 1, wherein an enlarged diameter portion is provided near the base of the sleeve, and the enlarged diameter portion is configured to bite into the reinforcing member. 4. The ring-shaped groove is provided in the stator portion along the outer circumference of the sleeve, and the reinforcing member is press-fit into the groove.
The motor described in. 5. The one end of the flexible substrate is formed in a ring shape having an insertion hole at the center, and a reinforcing member having substantially the same shape as the one end of the ring is provided, and the one end of the flexible substrate and The motor according to claim 1, wherein the reinforcing member includes a slit along the hole.